Add some more notes from today

Signed-off-by: Sam Phippen <samphippen@googlemail.com>
Use midpoint function instead of manually calculating

Signed-off-by: Sam Phippen <samphippen@googlemail.com>
Add the final chopper implementation

Signed-off-by: Sam Phippen <samphippen@googlemail.com>
Add the chopper performance tests.

Signed-off-by: Sam Phippen <samphippen@googlemail.com>
Add the end of the notes

Signed-off-by: Sam Phippen <samphippen@googlemail.com>
Run tests on chop3

Signed-off-by: Sam Phippen <samphippen@googlemail.com>